Following is the IRS definition of a household employee.

"You have a household employee if you hired someone to do household work and that worker is your employee. The worker is your employee if you can control not only what work is done but how it is done. If the worker is your employee, then it does not matter whether the work is full time or part time nor that you hired the worker through an agency or from a list provided by an agency or an association. It also does not matter whether you pay the worker on an hourly, daily, weekly or by the job."